Coating liquid for forming transparent conductive film, substrate with transparent conductive film, and display device

a technology of transparent conductive film and coating liquid, which is applied in the direction of instruments, conductive layers on insulating supports, non-metal conductors, etc., can solve the problems of lowering the transparency or haze of the conductive film, the difficulty of forming a and the conductive film having not only low surface resistance. , to achieve the effect of lowering the electric conduction

Inactive Publication Date: 2004-01-29
CATALYSTS & CHEM
View PDF4 Cites 57 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

0041] If the weight ratio exceeds the higher limit of the above range, electrical conduction is sometimes lowered because of too large amount of the silica particles which are insulating particles and too small proportion of the conductive fine particles.
0042] Examples of the polar solvents employable in the invention include water; alcohols, such as methanol, ethanol, propanol, butanol, diacetone alcohol, furfuryl alcohol, tetrahydrofurfuryl alcohol, ethylene glycol and hexylene alcohol; esters, such as methyl acetate and ethyl acetate; ethers, such as diethyl ether, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether and diethylene glycol monoethyl ether; and ketones, such as acetone, methyl ethyl ketone, ace

Problems solved by technology

In case of the conventional conductive oxide such as Sb-doped tin oxide or Sn-doped indium oxide, therefore, there resides a problem that it is difficult to form a conductive film having not only low surface resistance and excellent electromagnetic blocking properties but also excellent anti-reflection properties.
However, the conductive film formed by the use of such a film-forming coating liquid has high intergranular resistance and is not decreased in the surface resistance in some cases because the metallic fine particles are in contact

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation of Dispersion of Silica Particles (A)

[0093] To 2000 g of a silica sol (SI-550, available from Catalysts & Chemicals Industries Co., Ltd., average particle diameter: 5 nm, SiO.sub.2 concentration: 20% by weight, Na in silica: 2700 ppm), 6000 g of ion exchange water was added, then 400 g of a cation exchange resin (SK-1BH, available from Mitsubishi Chemical Corporation) was added, and they were stirred for 1 hour to perform dealkalization. After the cation exchange resin was separated, 400 g of an anion exchange resin (SANUPC, available from Mitsubishi Chemical Corporation) was added, followed by stirring for 1 hour to perform deanionization.

[0094] Subsequently, 400 g of a cation exchange resin (SK-1BH, available from Mitsubishi Chemical Corporation) was added again, followed by stirring for 1 hour to perform dealkalization. Thus, a dispersion of silica particles (A) having a SiO.sub.2 concentration of 5% by weight was prepared. The Na content in the silica particles was 2...

example 2

Preparation of Coating Liquid (2) for Forming Transparent Conductive Film

[0112] A coating liquid (2) for forming a transparent conductive film having a solids concentration of 0.4% by weight was prepared in the same manner as in Example 1, except that the dispersion of metallic fine particles (1), the dispersion of silica particles (A) and the polar solvent were mixed in such amounts that the WB / WA weight ratio became 0.05.

Preparation of substrate (2) with Transparent Conductive Film

[0113] A substrate (2) with a transparent conductive film was obtained in the same manner as in Example 1, except that the coating liquid (2) for forming a transparent conductive film was used.

[0114] The surface resistivity, haze, bottom reflectance, luminous reflectance and adhesion properties of the resulting substrate (2) with a transparent conductive film were evaluated.

[0115] The results are set forth in Table 1.

example 3

Preparation of Coating Liquid (3) for Forming Transparent Conductive Film

[0116] A coating liquid (3) for forming a transparent conductive film having a solids concentration of 0.4% by weight was prepared in the same manner as in Example 1, except that the dispersion of metallic fine particles (1), the dispersion of silica particles (A) and the polar solvent were mixed in such amounts that the WB / WA weight ratio became 0.25.

Preparation of Substrate (3) with Transparent Conductive Film

[0117] A substrate (3) with a transparent conductive film was obtained in the same manner as in Example 1, except that the coating liquid (3) for forming a transparent conductive film was used.

[0118] The surface resistivity, haze, bottom reflectance, luminous reflectance and adhesion properties of the resulting substrate (3) with a transparent conductive film were evaluated.

[0119] The results are set forth in Table 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Fractionaaaaaaaaaa
Nanoscale particle sizeaaaaaaaaaa
Nanoscale particle sizeaaaaaaaaaa
Login to view more

Abstract

Disclosed is a coating liquid for forming a transparent conductive film, comprising conductive fine particles having an average particle diameter of 1 to 200 nm, silica particles having an average particle diameter of 4 to 200 nm and a polar solvent. The silica particles are in the form of chain silica particles having 2 to 10 silica particles on an average being connected. The content of an alkali in the silica particles is not more than 1000 ppm in terms of an alkali metal M. Also disclosed is a substrate with a transparent conductive film, comprising a substrate, a transparent conductive fine particle layer formed on the substrate and containing conductive fine particles having an average particle diameter of 1 to 200 nm and silica particles having an average particle diameter of 4 to 200 nm and/or chain silica particles having 2 to 10 silica particles on an average being connected, and a transparent film provided on the transparent conductive fine particle layer and having a refractive index lower than that of the transparent conductive fine particle layer. A display device using the substrate with a transparent conductive film is further disclosed. The coating liquid for forming a transparent conductive film is capable of forming a transparent conductive film having low surface resistance, excellent antistatic properties, excellent electromagnetic blocking properties, high film strength and excellent adhesion to a substrate.

Description

[0001] The present invention relates to a coating liquid for forming a transparent conductive film. The present invention also relates to a display device having a transparent conductive film.[0002] For the purpose of preventing electrostatic charging and reflection on the surfaces of transparent substrates of display panels, such as cathode ray tubes, fluorescent indicator tubes and liquid crystal display plates, transparent films having antistatic function and anti-reflection function have been conventionally formed on these surfaces.[0003] In recent years, influences of electromagnetic waves released from the cathode ray tubes or the like on human bodies have been put into problem, and in addition to the prevention of electrostatic charging or reflection, it has been desired to block the electromagnetic waves and the electromagnetic fields formed with release of the electromagnetic waves.[0004] One method to block the electromagnetic waves is a method of forming a conductive film...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B32B7/02C08K3/08G02F1/1345C08K3/10C08K3/36C09D1/00C09D5/24C09D183/02C09D183/04G02B1/10G02B1/11G02B1/111G02B1/14G02B1/16H01B1/00H01B1/16H01B1/18H01B1/20H01B1/22H01B5/14H01J29/88
CPCC08K3/08C08K3/10C08K3/36C09D1/00H05K9/0096C09D183/02C09D183/04H01B1/16H01B1/18C09D5/24H01J29/18
Inventor MATSUDA, MASAYUKIKUMAZAWA, MITSUAKIISHIHARA, YOICHIHIRAI, TOSHIHARUKOMATSU
Owner CATALYSTS & CHEM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap